BACKGROUND & AIMS:
:PM(10) aerosol samples were collected in Durg City, India from July 2009 to June 2010 using an Andersen aerosol sampler and analyzed for eight water-soluble ionic species, namely, Na(+), NH(4) (+), K(+), Mg(2+), Ca(2+), Cl(-), NO(3) (-) and SO(4) (2-) by ion chromatography. The annual average concentration of PM(10) (253.5 ± 99.4 μg/m(3)) was four times higher than the Indian National Ambient Air Quality Standard of 60 μg/m(3) prescribed by the Central Pollution Control Board, India. The three most abundant ions were SO(4) (2-), NO(3) (-), and NH(4) (+), with average concentrations of 8.88 ± 4.81, 5.63 ± 2.22, and 5.18 ± 1.76 μg/m(3), respectively, and in turn accounting for 27.1 %, 16.5 %, and 15.5 % of the total water-soluble ions analyzed. Seasonal variation was similar for all secondary ions i.e., SO(4) (2-), NO(3) (-), and NH(4) (+), with high concentrations during winter and low concentrations during monsoon. Varimax Rotated Component Matrix principal component analysis identified secondary aerosols, crustal resuspension, and coal and biomass burning as common sources of PM(10) in Durg City, India.
背景与目标:
:PM(10)气溶胶样品是使用Andersen气溶胶采样器于2009年7月至印度Durg市收集的,并分析了8种水溶性离子物质,即Na(),NH(4)(),K( ),Mg(2),Ca(2),Cl(-),NO(3)(-)和SO(4)(2-)的离子色谱法。 PM(10)的年平均浓度(253.5±99.4μg/ m(3))是印度中央污染控制委员会规定的印度国家环境空气质量标准60μg/ m(3)的四倍。三个最丰富的离子是SO(4)(2-),NO(3)(-)和NH(4)(),平均浓度为8.88±4.81、5.63±2.22和5.18±1.76μg/ m (3)分别占所分析的水溶性离子总数的27.1%,16.5%和15.5%。所有次级离子(即SO(4)(2-),NO(3)(-)和NH(4)()的季节变化都相似,冬季时浓度高,而季风时浓度低。 Varimax旋转成分矩阵主成分分析确定了二次气溶胶,地壳悬浮以及煤和生物质燃烧是印度杜尔格市PM(10)的常见来源。